This work investigated the removal of phenol from petroleum wastewater by the electro‐oxidation process. The experimental design was developed on a pilot‐scale electro‐oxidation system equipped with a cylindrical shape of graphite electrodes as an anode and stainless‐steel electrodes as a cathode. An initial study was performed based on operating variables such as current density and time on real petroleum wastewater. The optimum conditions were obtained as a current density of 3 mA/cm² and time 15 min. Under these applied optimum conditions, complete phenol removal from an initial concentration of about 6.8 mg/L was achieved. Also, 50–60% removal of organic matter in terms of chemical oxygen demand (COD) and biological oxygen demand (BOD). The removal of organic matter using electro‐oxidation requires a long reaction time. Also, the economic study indicated that the energy consumption was determined to be 0.79 kWh/m³ and the operating cost was 0.051 $/m³ which is very economical compared with conventional methods.

中文翻译：

---

使用带有石墨和不锈钢电极的新型中试规模电化学池，对石油废水中的苯酚进行电氧化

这项工作研究了通过电氧化方法从石油废水中去除苯酚的方法。实验设计是在中试规模的电氧化系统上开发的，该系统配备了圆柱形石墨电极作为阳极，不锈钢电极作为阴极。最初的研究是基于诸如实际石油废水的电流密度和时间之类的操作变量进行的。获得了最佳条件，电流密度为3 mA / cm ²15分钟 在这些适用的最佳条件下，可以从约6.8 mg / L的初始浓度中完全去除苯酚。同样，根据化学需氧量（COD）和生物需氧量（BOD）去除有机物的50-60％。使用电氧化去除有机物需要较长的反应时间。此外，经济研究表明，确定的能耗为0.79 kWh / m ³，运行成本为0.051 $ / m ³，与传统方法相比非常经济。